Island



(No Model?)- M v M. H. BRONSDON.

UABLB RAILWAY ONDUIT.

No." 477,884. Patented June 28, 1892,.

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ilivrrnn STATES ATENT tinten..

MILTON H. BRONSDON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE- HALF TO WALTER RICHMOND, OF SAME PLACE.

Y CABLE-RAILWAY CON DUlT.

SPECIFICATION forming part of Letters Patent No. 477,884, dated June 28, 1892.v Application filed July 1'7, 1891. Serial No.A 399,799. (No model.)

To all whom t may concern: rail itself. The yokes are adapted to support Beit known that I, MILTON H. BRONSDON, a both rails and also the parts forming the tuncitizen of the United States, residing at Provinel. A cable road, or rather the underground dence, in the county of Providence and State or conduit portion of it, embodying my 1mof Rhode Island, have invented certain new provements can be more quickly and'cheaply 55 and useful Improvements in Cable Conduits laid, because the necessary eXcavatlons are orTunnels for Cable Roads; and Ido hereby shallower, the foundations are less extensive, declare the following to be a full, clear, and the'relative as Well as the actualcost of the exact description of the invention,sueh as will materials are less, the structure 1s stronger,

1o enable others skilled in the art to which it apalthough lighter, the sides of the tunnel are 6o pertains to make and use the same, reference flat and smooth, (therefore the wear of the being had to the accompanying drawings, and traveling grip and cable due to contact with to letters 0f reference marked thereon, which vthe tunnel is reduced to aminimuim) the gripform a part of this specification. v slot is prevented from closing and the tunnel The invention forming the subject of my may be readily taken apart for repairs when 6 5 present application for Letters Patent relates necessary. to cable railroads, but more especially to the In the appended sheet of drawings, Figure conduit or slotted cable-tube portion of such l represents a transverse or cross-sectional railroads. View of a cable-railroad conduit, 85e., embody- 2e It has been usual' heretofore, particularly ing my improvements as in use. Fig. 2 is a 7o in conduits connected with rail-supporting vertical transverse sectional view ofthe yoke, frames, to make the tunnels comparatively taken on line a; of Fig. 1, and also showing large in area cross-sectionally, the opening in a portion of the cable-tunnel. Fig. 3 is a plan some cases`being of a size to allow a person view of the yoke itself; and Fig. 4 is a side 2 5 to freely pass through it. There are objeoelevation, in reduced scale, showing the ar- 75 tions to conduits of such large proportions. rangement of the tunnel and yokes, the track- For example, the necessarily increased weight rails being omitted. -v involves greater cost formateriahtheexcava- Again referring to the drawings, A inditions and foundations are more extensive and cates the chamber or tunnel as a Whole, in

3e costly, and the lateral pressure upon the sides which the cable and gripping device freely 8o of the conduit due to frost, heavy traffic, dto., travel. This tunnel or conduit is practically 'frequently closes the narrow grip slot in continuous, and it consists of two angle-irons places, thereby renderingtheroad inoperative a, one of its sides or legs being shorter than for the time being. the other, the same as commercially rolled,

3 5 The object I seek to attain is to overcome and a ilat rolled plate or strip b. The two an- 85 the disadvantages just referred to. To that gle-irons a are so placed that the short legs a end myimproved cable-tunnel consists, essen areopposite to and separated from each other tially, of rolled angle-irons so placed that the at the top, thereby forming the top of the connpper flanges are separated from each other duit and the narrow slot d, along which lat- 40 to form a continuous grip-slot, a rolled plate ter the grip lever or connection e (shown by 9o forming the bottom of the tunnel arranged to dotted lines in Fig. l) freely travels. As engage with the lower edges of the angledrawn,the two longitudinal sides of the plate irons, and cast-iron rail-carrying yokes or b are cut away or recessed along the upper girders having said rolled irons and plates seedges at b to form a seating for the lower cured thereto, all as will be more fully hereedges ofthe side plates or angle-irons a., such 95 l inafter set forth and claimed. recesses at the same time serving as a lateral By means of my invention I am enabled to guide or support to prevent the sides of the employ rolled iron having a commercial form tunnel from being sprung or bent inwardly. and size. The track-rails used may have any The cable-tunnel is supported longitudiwell-known form, as I make no claim to the nally at intervals, say, of four feet by cast- Ioo iron ties or yokes c, each, as drawn, havinga central U-shaped opening flanked by laterally-projecting iianges c2, adapted to receive,

It will be seen that my improved cable-tunnel is perfectly smooth inside, the bolt-heads alone projecting inwardly, and these may be countersnnk, if necessary. Where the sections or lengths of angle-iron d meet, I prefer to arrange them so as to abut together in one of the yokes, as indicated in Fig. 2.

The cable g and a portion of one of the cable-supportin g sleeves or pulleys are indicated by dotted lines in Fig. 1. So also are the grip e and the grip-arm e.

In constructing acable road embodying my improvements it will be seen that only comparatively shallow excavations need be made in the street to receive the yokes, While a much shallower continuous one suffices for the conduit itself, the size of the latter interiorly being, say, six by eleven inches. After the yokes have been properly set the rolled iron pieces a a b are placed in the U- shaped openings of the yokes and secured in position by the side bolts h and the bottom bolts h. The rails fr may next be located upon and secured to the flanges c of the yokes by suitable bolts m, after which the excavations are properly refilled and the street surfaced olf, as usual. By means of such construction I am enabled to produce the improved roadway with greater rapidity and less cost as compared with other cable roads. It is to be understood that the surfaces of the yokes, zc., are first properly covered to prevent oxidation.

My improved conduit A is equally adapted to be used as a support for one or more suitably-mounted electric wires or conductors, the slot cl at the same time serving to receive an arm or lever arranged to be electrically connected with the conductors.

I am aware that it is not new to employ rolled plates for the sides of the cable tube or conduit. Therefore I do not claim such construction, broadly; but

What I do claim as my invention is- In a cable road, the yoke or chair c, provided with integrally-formed oppositely-ar ranged ends adapted to receive and carry the two track-rails and having a ianged central opening extending downwardly from the top of the yoke, in combination with the. tunnel or cable-conduit A, composed of oppositely-arranged rolled angle-iron plates a and bottom plate b, secured to said yokcs, and having the top members d of the platesaseparated from each other to form the central longitudinal slot d, substantially as described, and for the purpose set forth. y

In testimony whereof I have aflixed my signature in presence of two witnesses.

MILTON II. BRONSDON. Witnesses:

CHARLES HANNIGAN, GEO. H. REMINGTON. 

